Specifications

A-6

A LAUER driver

Word no.: Meaning:

D0 RDADR: Boards - base address +2 reading (EZ)

D2 WRADR: Boards - base address +2 writing (AZ)

D4 STAADR: Boards - base address +1 reading (EZ)

A1.5 Operation the PLC with EPROM/EEPROM

Please note the following. When using EPROM and EEPROM memory

modules in the programmable controller, the communication area cannot

be located within one data block since these data words are fixed in

EPROM/EEPROM and thus cannot be manipulated anymore (write

operations are not possible).

The only possibility consists in altering the cross-reference data block so

that the entire system area (word 3 to word 22 including) and the used

variable area (from word 23 to 255 maximum) are located in a modifiable

memory area (e.g. flag area, data buffers etc.).

Implementation of the handling PB 1. Power-down the programmable controller

2. Define the PCS 830 address and the baud rate using the DIL-switches

3. Plug-in the board

4. Set the programmable controller to stop and apply power

5. Re-adjust the cross-reference data block addresses if necessary

6. Reset P4 (flag for restart) in the OBs 7 and 8

7. Select and parameterize the -PCSKOMM PB of OB1 (or anywhere

else)

8. Adjust INIT and COFF

9. Define the reset pushbutton and set P2 (reset) with the positive edge

10. Assign, link, and download all data blocks into the controller

11. Switch the programmable controller to RUN

The implementation has been successfully completed if the K8000H fault

(timeout if no PCS is connected) appears in DW3 (default assignment)

and the flags P4 (restart) and P3 (general error message) are both set to

logical 1. In addition, the PCS 830 must indicate the „STATUS“ value „7“.

An example (OB1) is contained on the floppy disk which indicates a fault

on output 0.0, expects a reset pushbutton on E 0.0, uses the flag 20.0,

and addresses the PCS 830 board as EZ/AZ 4-7. The baud rate set at

the PCS and at the PCS 830 using the DIL-segments is used as

communication baud rate.